CHETROPTERA. lo 
The fossil having been thus brought to a particular 
section of the unfoliated or simple-nosed Bats, its affinity 
to some particular genus or species of this family remained 
to be considered. The Barbastelle, the Pipistrelle, and the 
Noctule, offer three modifications of the anterier upper 
premolar; * it is rudimental, hardly discernible in the first, 
of large size and more outwardly situated in the second, of 
intermediate size but not visible from the outside of the 
jaw, in the third species. The fossil comes nearest the 
Noctule in this character. The canines and large molar 
teeth afford no grounds of discrimination amongst these 
genera. 
The skull, by the somewhat greater length of the cranium 
and its strong sagittal crest, confirms the indication given by 
the teeth and the heel-spine of the affinity of the fossil or 
pseudo-fossil to the true Vespertiliones, and herein, more es- 
pecially to the Great Bat of Pennant (Vespertilio noctula), 
the first of the British existing species described by Pro- 
fessor Bell. 
RHINOLOPHUS FERRUM-EQUINUM. 
From amongst the more fragmentary fossils of Cave 
Cheiroptera, 1 select a ramus, or half lower jaw (fig. 6) with 
the coronoid process broken off, but with 
the series of teeth perfect, since these eG: 
manifest characters which indicate not only ie 
: 5 Sic : (iit 
a species of Bat distinct from the preceding, = “©——~™> 
but, likewise, one that belongs to a different 
section of the order. There are two false molars in this 
lower jaw, as in the Vespertilio Noctula, but of different 
* The “ molares spurii,” or “ false molars,” “ bicuspides,” in Human Anatomy ; 
they are situated before the true molars, between these and the canine. 
